Wouter,
<br>In answer to your questions.
<br>Yes I do have a wing mast on my Taipan and it does carry less rotation but this is more evident in lighter conditions.
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<br>As the wind strength increases the difference between rotation angles decreases.
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<br>From memory I would not be carrying any more rotation in the 15 to 20 range on my Cobra which had a conventional shaped mast, than on my Taipan.
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<br>From your post I gather the I17 does not have a wing mast.
<br>This surprises me.
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<br>If the I17 has a conventional mast ,because of turbulence from the mast, it is more difficult to use luff tell tales to set rotation.
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